PixInsight, Photoshop CS3, Noel Carboni's actions.
eXcalibrator for (u-g), (g-r) color calibration, using 7 stars
from the SDSS-DR7 database.
PixFix32 (pre-beta) to
repair column defects.
CCDStack to calibrate,
register, normalize, data reject, combine the sub exposures & selective deconvolution.
PixInsight for the LRGB
combine, non-linear stretching
and gradient removal.
final tweaks and background noise reduction with the
Noiseware Pro plug-in.